Work-support for bottom cutter-heads of wood-planers.



No. 873,657 PATENTED DEC. 10, 1907. O. WL H. BLOOD & O. G. OSTEMAN. WORK SUPPORT FOR BOTTOM CUTTER HEADS OF WOOD PLANERS.

APPLICATION FILED 0(JT.15,1906.

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7-H: mmms PETERS 00., WASHINDYON, n. c.

UNITED STATES PATENT OFFICE.

CHARLES W. H. BLOOD AND CARL G. OSTEMAN, OF BOSTON, MASSACHUSETTS, ASSIGNORS TO S. A. WOODS MACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

, WORK-SUPPORT FOR BOTTOM CUTTER-I'DLADS OF WOOD-PLANERS.

Specification of Letters Patent.

Patented Dec. 10, 190?.

Application filed October 15. 1906. Serial No. 338-965.

T 0 all whom it may concern:

Be it known that we, CHARLEs W. H. BLoon and CARL G. OSTEMAN, citizens of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in WVork- Supports for Bottom Cutter-Heads of I/Vood- Planers, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

In wood planers, especially when running narrow stock, the stock support or bar-afterthe-cut is apt to wear unevenly, and as heretofore constructed this has sometimes necessitated removing the. bar and dressing it down even before it would be replaced. Accordingly our invention resides in providing a guideway at the rear of the bottom cutterhead transversely of the machine, on which is mounted a bar-after-the-cut capable of being adjusted lengthwise of said guideway, so that the bearing surface may be changed for narrow stock, thereby wearing the bar evenly and preventing any inaccuracy of the work due to unevenness of the support, while at the same time obviating the delay and expense of removing the bar, as explained.

Our invention will be further explained and defined in the following description taken in connection with the accompanying drawings, in which we have shown a preferred embodiment of our invention.

In the drawings, Figure 1 is a plan view of a portion of a usual wood planer provided with our attachment; and Fig. 2 is a transverse sectional view thereof.

It will be understood that the lower cutterhead 1 mounted in a base 2, and the upper cutter-head 3 carried by a top head or work support 4, may be of any usual or preferred construction.

At the rear of the cutter-head 1 we provide a transverse guide bar 5 having opposite beveled ways 6, 7 and normally clamped immovably on the bed 2 by bolts 8 occupying slots 9 in said bar, whereby the bar may be accu-' rately adjusted toward and from the cutterhead. To prevent the bar 5 from being accidentally moved into improper proximity to the cutter-head we provide set screws 10 extending obliquely forward to engage the front edge of the recesses 11 provided therefor in the bed, as clearly shown in Fig. 2. On this guide bar 5 we mount the work rest 12, which constitutes the bar-atfter-the-cut, for sup porting the stock consisting of a top portion having a projecting end 13 overhanging the bottom cutter-head 1 and having a depending lip 14 for fitting against the adjacent beveled edge 6 of the guideway and provided at its rear side with a heavy gib 15 clamped thereto by bolts 16 and properly recessed to fit the angular surfaces 7 of the guideway.

In order to maintain accuracy of level and prevent any irregularity of position which might be caused by the presence of dust, pitch or dirt on the slide surface of the bar 5 we preferably provide the supporting plate or bar-after-the-cut 12 .with a projecting shield or protecting plate 17, which extends laterally over the supporting surface of the bar 5 as clearly shown in the drawings. The guide bar 5 extends at its rear end (toward the top of Fig. 1) a sufficient distance beyond the working width of the machine to receive and support the bar 12 when the latter is shoved out beyond the cutter-head 1 away from in front of the latter so as to leave the latter entirely exposed, and also preferably extends similarly at its opposite end so that the workman can pull the bar 12 toward him when desired and examine or adjust the same while still properly mounted on the bar 5 and yet entirely away from the cutterhead. The shield plate 17 moves with the bar 12 at all times, so that in whatever position the latter may be it is impossible for the guide bar to become loaded with dust at the point which supports the bar 12 when in normal operative position. A long edge guide 18 extends across the bottom cutterhead 1 and bar 12 just above the same, and has an enlarged end 19 slotted at 20 for adjustment by means of a bolt 21 on a boss 22 of a block 23 apertured at 24 to receive a bolt 25 secured to the bed of the machine. This long guide 18 thus constructed permits the bar-after-the-cut to have the desired movement transversely of the machine and lengthwise of the guide bar 5.

Whenever narrow stock is being run through the machine the operator frequently shifts the bar-after-the-cut 12 longitudinally on the guide bar 5 sufiiciently to bring a fresh surface into supporting engagement with the narrow stock, the result being that the bar 12 wears evenly and smoothly and thereby conduces to perfect work.

;It is to be understood that we are not limited to the precise details of construction herein shown, inasmuch as our invention is capable of various changes in form and arrangement of parts without departing from the spirit and scope of the invention.

Having described our invention, what we claim as new and desire to secure by Letters Patent is,

1. A wood planer, comprising a bed, a cutterhead, a guide'bar mounted adjacent and parallel to said cutter-head, means for adjusting said guide bar toward and from said cutter-head including set-screws adjustably mounted in said bar and shoulders in said bed for said set screws to engage for limiting the transverse adjustment of the bar on said bed, and a bar-after-the-cut carried by said bar.

2. A wood planer, comprising a bed, a cutter-head extending transversely of the bed, a long guide extending lengthwise of the bed adjacent said cutter-head, a guide bar secured to the bed of the machine parallel to said cutter-head and extending beneath said long guide, a bar-after-the-cut adjustably mounted on said guide bar to slide along the same, and supporting means secured to the bed supporting the long guide above and out of contact with the bar-after-the-cut to per mit the latter to slide on its guide bar freely beneath said long guide in operative position with relation to said cutter-head.

3. A wood planer, comprising a bed, a

' cutter-head extending transversely of the bed, a long guide extending lengthwise of the bed adjacent said cutter-head, a guide bar secured to the bed of the machine parallel to said cutter-head and extending beneath said long guide, a barafter-the-cut adjustably mounted on said guide bar to slide along the same, and supporting means adjustably secured to the bed supporting the long guide above and out of contact with the bar-afterthe-cut to permit the latter to slide on its h guide bar freely beneath said long guide in operative position with relation to said cutter-head.

4. A wood planer, comprising a bottom cutter-head, a guide bar at the rear thereof extending across the machine adjacent said cutter-head, and a bar-after-the-cut adjustably secured to said. guide bar to slide lengthwise of the latter, and provided beyond the end of the cutter head with a hooddike extension in the form of a shield plate permanently secured to move with the bar-after-thecut for protecting the end of said guide bar beyond the bar-after-the-cut.

5. A wood planer, comprising a bed, a cutter-head, a guide bar mounted adjacent and parallel to said cutter-head, said bar being provided with transversely elongated slots, clamping bolts extending through said slots into said bed, set-screws angularly mounted in said bar to engage the bed for cooperating with the bolts in holding the bar in fixed adjustment, a bar-after-the-cut mounted to slide longitudinally on said guide bar, and means for clamping said barafter-the-cut in adjusted position.

6. A wood planer, comprising a cutterhead, a guide bar mounted arallel to said cutter-head having an angu ar longitudinal guiding edge, and a bar-after-the-cut slidingly mounted on said guide bar provided with an independent depending gib angularly shaped on its inner side to fit said angular longitudinal guiding edge of the gulde bar, and clamping means for adjustably clamping said gib on said bar-after-the-cut and said guide bar.

7 A wood planer, comprising a bed, a transverse bottom cutter-head, a bar-afterthe-cut for receiving and supporting the work from said cutter-head, and a guide bar secured to the bed of the machine parallel to said cutterhead, the bar-after-the-cut being retained by and mounted to slide lengthwise of said guide bar transversely of the machine, and said guide bar projecting beyond the working width of the machine a suflicient distance to permit the bar-after-the-cut to be shoved out upon it beyond and out of the way of the cutter-head.

8. A wood planer, comprising a bed, a bottom cutter-head mounted therein, a guide bar secured to the bed parallel to said cutterhead, and a bar-after-the-cut adjustably mounted on said guide bar to slide lengthwise of the latter, said guide bar projecting at one end beyond. the end of the cutter-head a SllffiGllGIll] distance to receive and support said bar-after-the-cut when moved thereon away from in front of the cutter-head, and a shield plate permanently secured to the barafter-the-cut to cover said projecting end. of the guide bar when the bar-after-the-cut is in operative position in front of the cutteread.

9. A wood planer, comprising a bed, a bottom cutter-head mounted therein, a guide bar secured to the bed parallel to said cutterhead, and a bar-after-the-cut adjustably mounted on said guide bar to slide lengthwise of the latter, said guide bar projecting at its opposite ends beyond the cutter-head a SllffiClGIlt distance to receive and support the bar after the out when moved in either direction entirely from in front of the cutter-head.

10. A wood planer, comprising a bed, a bottom cutter-head mountedv therein, a guide bar secured to the bed parallel to said cutterhead, and a bar-after-the-cut adjustably mounted on said guide bar to slide lengthwise of the latter, said. guide bar being sufliciently longer than the working width of the machine to continue to support in sliding position thereon the bar-after-the-cut when the latter is slid to one side of the machine away from in front of the cutter-head, and a shield plate permanently secured to one end In testimony whereof, we have signed our of the bar-after-the-cut in position to cover names to this specification, in the presence 10 the top surface of the guide bar and c6operof two subscribing witnesses.

ate with the bar-after-the-cut in maintaining CHARLES W. H. BLOOD. at all times free from dust that portion of the CARL G. OSTEMAN. guide bar which supports the bar-after-thel/Vitnesses:

cut when in normal operative position in LESTER E. PRATT,

front of the cutter-head. EDMUND A. RoTHwELL. 

